如何在工厂女孩中正确设置关联

Question

我是FactoryGirl的新手。我来自赛程世界。

我有以下两种型号：

class LevelOneSubject < ActiveRecord::Base
  has_many :level_two_subjects, :inverse_of => :level_one_subject
  validates :name, :presence => true
end
class LevelTwoSubject < ActiveRecord::Base
  belongs_to :level_one_subject, :inverse_of => :level_two_subjects
  validates :name, :presence => true
end

我想在工厂做类似的事情：

FactoryGirl.define do
  factory :level_one_subject, class: LevelOneSubject do
    factory :social_sciences do
      name "Social Sciences"
    end
  end
  factory :level_two_subject do
    factory :anthropology, class: LevelTwoSubject do
      name "Anthropology"
      association :level_one_subject, factory: social_sciences
    end
    factory :archaelogy, class: LevelTwoSubject do
      name "Archaelogy"
      association :level_one_subject, factory: social_sciences
    end
  end
end

然后，当我在这样的规范中使用工厂时：

it 'some factory test' do
  anthropology = create(:anthropology)
end

我收到错误：

NoMethodError: undefined method `name' for :anthropology:Symbol

有人可以在这里帮忙吗？

如果我没有在工厂中设置关联，那么我不会收到此错误，但是我得到的错误是必须存在level_one_subject_id并且只有以下测试代码有效：

it 'some factory test' do
  social_sciences = create(:social_sciences)
  anthropology = create(:anthropology, :level_one_subject_id => social_sciences.id)
end

但我真的很想知道为什么有协会的工厂不工作。有了固定装置，我白白拥有了这一切。

Answer 1

我认为您正在尝试按"类工厂"对工厂进行分组，这不是FactoryGirl的工作方式。它将从工厂名称本身推断出 ActiveRecord 类（如果命名正确）。如果您的工厂名称与类名不同，我们需要使用类命名参数显式指定类名。这应该有效：

FactoryGirl.define do
    factory :level_one_subject do # automatically deduces the class-name to be LevelOneSubject
        name "Social Sciences"
    end
    factory :anthropology, class: LevelTwoSubject do
        name "Anthropology"
        level_one_subject # associates object created by factory level_one_subject
    end
    factory :archaelogy, class: LevelTwoSubject do
        name "Archaelogy"
        level_one_subject # associates object created by factory level_one_subject
    end
end